LTC3309A

推荐新设计使用

采用 2mm x 2mm LQFN 封装的 5V、6A 同步降压型 Silent Switcher

数据手册 (Rev. B) 产品选型表

产品模型: 23

Viewing:

产品详情

与LTC3307(3A)和LTC3308(4A)引脚兼容
高效率：8mΩ NMOS，31mΩ PMOS
可编程频率：1MHz - 3MHz
- 小型电感和电容
峰值电流模式控制
- 22ns最短导通时间
- 宽带宽、快速瞬态响应
Silent Switcher^® 架构
- 超低EMI辐射

低纹波突发工作模式(Burst Mode^®)，I_Q为40µA
可在过载情况下安全地承受电感饱和
V_IN 范围：2.25V至5.5V
V_OUT 范围：0.5V至V_IN
V_OUT 精度：±1%(全温度范围)
精准400mV使能阈值，关断时1µA
电源良好指示、内部补偿和软启动
散热增强型2mm x 2mm LQFN封装
通过AEC-Q100汽车应用认证

参考资料

ADI 始终高度重视提供符合最高质量和可靠性水平的产品。我们通过将质量和可靠性检查纳入产品和工艺设计的各个范围以及制造过程来实现这一目标。出货产品的“零缺陷”始终是我们的目标。查看我们的质量和可靠性计划和认证以了解更多信息。

产品型号	引脚/封装图-中文版	文档	CAD 符号，脚注和 3D模型
LTC3309AEV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AEV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AEV#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AEV#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AHV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AHV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AHV#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AHV#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AIV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AIV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AIV#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AIV#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV-7#3ZZPBF	18-Lead LQFN (3mm × 3mm × 0.94mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV-7#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV-7#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV-7#WTRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AJV-7#WTRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AMPV#TRMPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC3309AMPV#TRPBF	12-Lead LQFN (2mm x 2mm x 0.74mm)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

这是最新版本的数据手册

工具及仿真模型

LTspice 1

LTC3309A - Switching Regulators

LTspice中提供以下器件型号：

LTC3309A
LTC3309B

LTpowerCAD 1

LTC3309A Project - DC2745A 3-5Vin to 1.2V/6A, 2MHz

LTspice^®是一款强大高效的免费仿真软件、原理图采集和波形观测器，为改善模拟电路的仿真提供增强功能和模型。

LTpowerCAD^®是一种电源设计程序，它选择功率级元件，提供详细效率信息，显示快速环路波特图稳定性和负载瞬态分析，并可导出至LTspice进行仿真。

评估套件

LTC3309A | 5V、6A同步降压型超低噪声开关稳压器，采用2mm × 2mm LQFN封装

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产品详情

演示电路2745A内置LTC3309A 5V、6A同步降压型超低噪声开关稳压器，作为2MHz 3.3V至1.2V 6A降压稳压器运行。LTC3309A支持0.5V至VIN的可调输出电压，工作频率为1MHz至3MHz。LTC3309A是一款紧凑型、超低辐射、高效率和高速同步单芯片降压型开关稳压器。凭借22 ns的快速最短接通时间，能够以高频率实现高V_IN到低V_OUT的转换。

DC2745A工作模式可选为突发工作模式Burst Mode^®、跳跃或强制连续(FC)模式。将JP1设置为FC/SYNC位置可将LTC3309A同步到1MHz至3MHz的时钟频率。同步到外部时钟时，LTC3309A会在强制连续模式下工作。RT通过0Ω电阻R9连接到VIN，可将工作频率设置为2MHz。通过移除R9并在R4位置设置适当的电阻，可以轻松更改频率以获得所需频率。有关正确的RT值，请参阅LTC3309A数据手册。

LTC3309A数据手册提供了完整的器件、操作说明和应用信息。必须将该数据手册与本演示配合阅读。LTC3309A组装在3mm × 3mm LQFN封装中，该封装具有裸露焊盘以实现低热阻。数据手册的“低EMI PCB布局”部分中提供了用于实现低EMI运行和最大热性能的布局建议。

效率与负载图显示了电路在突发工作模式下以及3.3V输入时的效率和功率损耗。LTC3309A采用12引脚2mm × 2mm LGA封装。

资料

DC2745A - Demo Manual (Rev.0)
1.47 M

DC2745A - Design Files
3.55 M

DC2745A - Schematic
111.46 K

参考电路

Artix US+ Rail Consolidation – Minimum Rails (AU10P/15P) Power Tree

用于AU10/15P和AU20/25P的最低供电轨——非硬件验证设计

查看参考设计详情

特性和优点

Xilinx Artix^® UltraScale+^™ devices are the industry’s only cost-optimized FPGAs based on an advanced, production-proven 16nm architecture for best-in-class performance/watt.

Analog Devices, Inc. supports power delivery solutions for the Artix Ultrascale+ low-cost designs. Monolithic solutions are used to power Xilinx FPGA and/or SoC rails as well as other system rails. These regulators are highly integrated discrete solutions optimized for cost, efficiency and footprint.

ADI provides supporting documentation including power schematics, layout, LTpowerPlanner^® and applicable LTpowerPlay^® configuration files to enable you to validate the power solution for your application seamlessly.